Crosshead



Nl. D. JOYNER.

CROSSHEAD.

APPLICATION FILED SEPT. 29. 1919.

15,362,422. Patented Deo. M, 1920.

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i@ f5 f f Y PP mmm 70 1,'5 5% P34! g 7 4; lNVENTOr-'zl WITNESSES BY I 1A M 9/ y A ATTORNEY NI. D. IOYNER.

CROSSHEAD. l

APPLICATION FILED SEPTZS?, i919.

LBGQAQQ I Patented Dec. 14,1920.

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ATTO R N EY UNITED STATES 'Pareti-f1"l oFrlcE.

MILES 5D. JOYNER, 0F SPARTANBURG, SOTHCAROIIA'.

` CROSSHEAD.

Specification of Letters Patent.

PatentedfDec. 14, 1920.`

Applicationy iled'september' 29, 1919. SeraINo. 327,144.

To all wil-0m t may concern.'

Be it knownthatul, MrLns D; JOYNER, a citizen of' the United States,residing at Spartanburg; in the county of Spartanburg.

relates-more particularly to an adjustable. gib and parts associatedtherewith, the ob-` ject being to provide for'the take-up of wearandthere'by insuring smooth runningv and long! life of the' machineryprovided with v1 the cross head.

In accordance with the invention the cross:

head comprises a body or boxingcomposed of side platesijoined togetherat one end of the cross `head by the piston rod socket and at the otherend by the` pivot bolt of the corresponding: pitman bearing. The sideplates taper, onmay taper from one end to the other, and lodged betweenthese plates' are gibs each formed of two partssplit longitudinally withthe split preferably, though not necessarily extendingdiagonally ofthevlen-gthl of-the gib. Moreovenleach gib isprovided with sidetlangesfinsetwith relation to thek side edges of the-gib to enter thespace betweentheplates. The sidel edges of theV gibs overhang. theplates tol about their outer faces, and projecting from the outer facesof eachgib are longitudinal side flanges, constituting.oneachgib a'longitudinal channel.V for the corresponding guide bar ofthe cross headstructure.`

The inset side flanges have strengthening bosses while the face platesof the crossand the bosses: as well as the side plates arev traversed bybolts or keys for securing the parts together.

lith such an arrangement ample' provision ismade for'taking up wea-r,both lat* erally' and longitudinally of the cross head,

so that the gibs vma-yybeadjusted fromtime to time and thefcrossheadwill run. smoothly withoutplay, thereby greatly prolongingV the lifeofthe cross-head' andparticularly of thegibs', but materiallycontributingY to smooth, noiseless: action.

The invention will be bestlunderstood trom'- y a Y consideration of thefollowing jde= tailed description taken in connection with theaccompanying l; drawin'g.;V with .the under standingyhowever, thatdniitspractical em` bodi'mentl` the. inventionfl is: not coniin'edl to any'strict conformity .with the; showing: of' the 'drawing-. but may@ bevchanged and modilied-solong as such changesand-modi'lications mark'nokmateriall departure froinfthesalient features of the` inventionas eX-pressedsin.` the appended claims.

In the. drawings;-

Figure lisa sideelevationofa cross head embodying the inventiom Fig. 2is alongitudinal vertical section thereof.

F is a plan view of the cross Vhead hown'inflig. l but omittingthe topguide Fig. 5 is a section of line 5--5 of Fig.` l.

Fig.. f6 is a perspectiveview of a taper key or liner.l

Figa? is an elevation showing-'a somewhat modified formoffthe crosshead.

Fig. 8 shows a crosshead construction-in which liners or shims areemployed and ar.- rangedV either" straightA longitudinally, or arrangeddiagonally.,`

F 9 isa crossfsectionof. the structure of F 1g..8, with the: shimsinthe. initialV orA centralA position..

Fig..l0 isa sectionsimilar to Fig. 9eXcept that it is assumed that theshims between the gib section have` been transferred to the outerwallswhere they engage `the inner wallsot the side plates of thecrosshead.

Rei-'erringto the drawings, there is shown a cross head Ylli-to oneendof which there is attached a piston rod B and to the other end of whichthere is connected a pitrnan C.

The body of the cross head comprises two plates l, which may beflatlplates sufficiently heavy for the purposes of the invention. Theplates are connected together at one end by a sleeve 2 which may be castinone piece with ytheplates and isot' suticient' dimensions to receiveone: end 3 0fthe `pieton rod B.

Following the usual custom the end 8 may be tapered and is suitablythreaded at its extremity for the application of nuts Ll, Iwhereby thecross head is firmly secured to the piston rod after the usual manner.

The pitman C is also connected to the cross head in the usual manner asby a pivot bolt 5 traversing the side plates 1 and bearing blocks 6 inthe corresponding end of the pitman, such end entering the space betweenthe side plates 1. Carried by the plates 1 are gibs D at opposite edgesof the cross head, these gibs being interposed between the plates 1 andparallel guide bars 7, such as are employed in the usual two-bar guide.The gibs may be made in various ways, the preferablev form being thatshown in Figs. 1 to 6, some other forms being shown in Figs. 7, 8, 9 and10.

rl`he preferable `form of gib is composed of two like members 8 and 9,respectively, having adjacent walls 10 extending diagonally of thelength of the two-part gib. Since the parts 8 and 9 are substantiallyalike, a den scription of one will apply yto the other. Because of thediagonal division line `oli the two parts of the gib, each gib sectionis wedge shape, being relatively wide at one end 11 and relativelynarrow at the other end 12. Moreover, the adjoining edge 10, in the formshown in Fig. 1 and associated ligures and best appearing inFig. 3, arevnot parallel, but diverge slightly from one end toward the other of thegib. Adapted to the space between the edges 10 is a strip 13 slightlytapering from end to end at the small end terminating in a threaded stem14- lfor the application 0f the nut 15. Furthermore, the stem 111 isprovided with a smooth termination 16 of somewhat smaller diameter thanthe threaded portion, whereby to withstand blows of a hammer or otherimplement without injury to the threads of the stem 14. Y

On what constitutes the outer long edge ot each gib member 8 and 9,there is formed a flange 17 which, when the gib is applied to thev crosshead, outstands therefrom in a manner causing the flanges 17 to be inpar-- allel relation to each other and embrace and receive the guidebars.

Formed on what may be termed the inner l'ace of each member 8 and 9 ofthe gib are longitudinal flanges 18 inset with relation to those sideedges of the body members 8 and 9 of the gib by a sufficient distance topermit the gib to seat on the corresponding edges j of the 4face plate1, with said Jface plates about flush with the outer faces of theilanges 17. 1n Fig. 1 and associated figures, each face plate hasslanting or diverging long edges 19 so that each plate 1 is a taperplate and the flanges 18 have correspondingly tapered edges 20. Adjacentto each edge 19 the plates 1 are provided with a series of holes orperforations 21 to pass bolts 22 which may be sufficient in number forthe purposes of the invention. Each ange 18 is provided with a suitablenumber of passages or perforations 23 spaced similarly to theperforations 21. Projecting from the inner faces of each iiange 18 arehollow bosses 24 continued to the inner taper edge of the respective gibmember 8 or 9 as the case may be. Because of the inner taper edges o'lthe gib members the bosses vary in length from one end or" a taperedmember to the other end4 thereof. With the ends of the taper members otthe gib opposite each other the corresponding passages 23 of the gibmembers 8 and 9 aline, and the bolts 22 may then be freely insertedthrough the alined passages.

rlhe strip 13, constituting a key or liner, is, in the showing of Figs.8, 5, and 7, of

slightly taper form and has an intermediate,

elongated, widened portion 25, with a longitudinal slot 2G therealong.The key or liner 18 is so shaped that the slot 26 is traversed by thebolts 22 with the edge of the lrey remote from the slot about or nearlyiiush with that surface o1E the gib members engaging the respectiveguide bar 7.

lWhen the cross head is assembled the piston rod 13 is secured to thesleeve 2 by the nuts et and the pitman C is secured to the cross head bythe bolt 5. The two members 8 and 9 of each gib are brought toward eachother so that the flanges 17 straddle the respective guide bars 7, withthe key or liner 13 interposed between the two members. T hen the bolts22 are inserted but are not yet tightened up. Now, by properly adjustingthe bolts 'the gibs are suitably tightened to produce a smooth, snug litand the wedge key or liner is drawn by the nut 15 to lock the gib in theadjusted position, such gib having a certain amount of longitudinaladjustment, without interference from the bolts traversing it by way ofthe slot 26.

lWhen the cross head is iirst installed it is, ci course, suitablylit-ted. After having been in use for some time the rubbing parts wearand unless the wear be talren up, undue looseness develops. in order totake up the loosenessrthe bolts 22 are removed and theV gibs are movedbodily lengthwise the taper edges 19 and 20, causing the gibs to moveapart or toward the bars 7. By arranging the bolts 22 sufficiently closetogether with the Slant of the taper edges 19 and 2O ap pro priatelygentle, the movement of the gibs to an extent corresponding to thedistance between two adjacent bolt holes will be Vsuliicient to againtighten the cross head with respect to wear ot the cross head as betweenthe guide bars 7. Wear also occurs between the flanges 17 and the sidesof the `guide bara 7, thus permitting side play of the cross head. Toremedy this outer walls 18a of the flanges 18 taperlongitudinally'toward one end of the gib andy theinner faces 18b of theface plates l taper correspondingly, so that the flanges 1T are causedto approach as the gib is adjusted lengthwise of the guide bars 7, thustaking up sidewear. The 'taper key or liner 123 compensates forvariations in the longitudinal and lateral adjustments for the taper keymay be moved lengthwise in the taper space provided for it, thus at alltimes producing a snug lit.

The smooth, snug running of the cross head may be restored at any timethat wear produces undue looseness and repeated adjustments arepermissible. The cross head of the invention therefore, will ontlastnumerous other forms of cross heads, thus making a material saving inmaterial and labor.

The diagonallyplaced key or liner 13, because of its position, avoidsliability of grooving or scoring the guide bars 7 and also may be insetslightly with relation to the surfaces of the gibs engaging the guidebars, thus forming pockets for lubricant.

lt is not obligatory that a taper key or liner like the wedge 13 beemployed, since fiat liners or shims 27, as indicated in Figs. 8, 9, andl0, may be utilized. The shims 2T may be thin plates 0r sheets, so thatan appropriate number of shims may be used, side by side, to permitequally small adjustments, in order to maintain the tit of the crosshead close at all times, with provision for taking up wear before it hasbecome serious. In such case the shims 27 are placed between the twomembers of the gib as in Figs. 8 and 9, where the two associated membersof the gib are indicated at 8a and 9a, and the meeting edges areparallel with the side edges of the gib. Or, the meeting edges may bediagonally arranged as shown in dotted lines in F ig. 8, the diagonallyplaced shims 27 being also indicated in dotted lines in the same figure.When it is desired to adjust the two members of each gib toward eachother, a shim 27 may be taken from between the gib members and placedbetween each side plate 1 and the corresponding flange 18 of the gib,the shim either being cut in two lengthwise or another Shim besubstituted. lt is evident that either the wedge-shaped key or liner, orstraight liners or shims, or a combination of the two may be used asdesired.

lVhat is claimed is 1. In a cross head, a gib divided and separatedlongitudinally into two parts with the division ruiming diagonally ofthe gib, and a key or liner lodged between and separating the two parts.

2, In a cross head, a gib divided and separated longitudinally into twoparts with the division running diagonally of the gib, and a key orliner lodged between and separating the two parts, the key taperinglengthwise and the walls bordering these plates separating the two partsof the gib correspondingly tapering.

3.-A cross head comprising face plates, longitudinally divided gibs eachwith flanges associated to form tongues for enteringy between the faceplates, a ,key or liner for each gib lodged between the adjacentportions of the gib, and fastening means traversing the face plates, thegib where provided with flanges, and the key or liner.

4. A cross head comprising face plates, longitudinally divided gibs eachwith flanges associated to form tongues for enter- 'ing between the faceplates, a key or liner for each gib lodged between the adjacent portionsof the gib, and fastening means traversing the face plates, the gibwhere provided with flanges, and the key or liner, said key or linerwhere traversed by the fastening means being provided with alongitudinal slot for passing the fastening means.

5. A cross head comprising face plates, longitudinally divided gibs withtongues entering between the face plates and the tongues being insetwith relation to the face plates, gibs overhanging and engaging theedges of the face plates with the overhanging portions of the tonguesand the edges of the face plates slanting, bolts traversing the faceplates and tongues and arranged in a corresponding slanted position, anda key or liner for each gib lodged in the divided portion thereof andseparating the two parts of the gib.

6. A cross head comprising face plates, longitudinally divided gibs withtongues entering between the face plates and the tongues being insetwith relation to the face plates, gibs overhanging and engaging theedges of the face plates with the overhanging portions of the tonguesand the edges of the face plates slanting, bolts traversing the faceplates and tongues and arranged in a corresponding slanted position, anda key or liner for each gib lodged in the divided portion thereof andseparating the two parts of the gib, said keys or liners tapering fromone end toward the other and the walls of the divided gibs, whereengaged by the keys, correspondingly tapering.

In a cross head, face plates with edges tapering lengthwise and theinner faces of the face plates tapering in thickness, longitudinallysplit gibs formed with channels to embrace guide bars and having flangesinset to enter between the face plates, with the gibs engaging the taperedges of the face plates and the gibs correspondingly tapered, saidflanges and face plates being provided with longitudinal, slantingseries of matching perforations to pass bolts for securing the faceplates and the gib together, and liners or keys lodged in the dividedportions of the liners, and traversed by the bolts.

8. ln a cross head, face plates with edges tapering lengthwise and theinner faces of the face plates tapering in thickness, longitudinallysplit gibs formed with channels to embrace guide bars and having flangesinset to enter between the face plates, with the gibs engaging the taperedges of the face plates and the gibs correspondingly tapered, saidflanges and face plates being provided with longitudinal, slantingseries of matching perforations to pass bolts for securing the faceplates and the gib together, and liners or keys lodged in the dividedportions of the liners and traversed by the bolts, the liners or keyseach tapering lengthwise and the walls of the gibs where divided beingcorrespondingly tapered.

9. In a cross head, face plates with edges tapering lengthwise and theinner faces of the face plates tapering in thickness, longi stem toreceive an adjusting nut.

tudinally split gibs Jformed with channels to embrace guide bars andhaving flanges inset to enter between the Jface plates, with the gibsengaging the taper edges of the face plates and the gibs correspondinglytapered, said flanges and face plates being provided with longitudinal,slanting series of matching perforations to pass bolts for securing theface plates and the gib together, and liners or keys lodged in the divided portions of the liners and traversed by the bolts, the liners orkeys each tapering lengthwise and the walls of the gibs where dividedbeing correspondingly tapered7 and each key or liner terminating in athreaded ln testimony, that I claim the foregoing as my own, l havehereto affixed my signature in the presence of two witnesses.

MILES D. JOYNER. Witnesses C. J. MILLER, F, G. AUsTELL.

